Carburetor valve



Patented Jan. 13, 1925.

UNITED TA S PATENT OFFICE. A

WILLIAM H. SLAYTON, OF SAN FRANL'OISCO, CALIFORNIA, ASSIGNOB- TO AMERICAN GARBURETEB. COMPANY, Oli VANCOUVER, \VASHINGTON, A CORPORATION.

can-Enamel; AL E.

a a n f led April 3, 1922. Serial No. 548,994.

To all whom it may concern:

Be it known that I, YVILLIAM H SLAYT N, a citizen ofthe United States, residing, at San Francisco, county of San Francisco, titate of California, have invented certain ne and useful Improvements in Carburetor Valves; and I do declare the'following to be a full, clear, and exact description identified type, in which the fuel in the bowl as well as the air drawninto the 1111X ing chamber is maintained in a heated condition, with automatically opened air-ad mission valves, so arranged with respect to the fuel-jet members that the ainwill'be drawn in practically all around the same, and will thus mingle more intimately with the fuel charge, the opening of the valves.

being had reason of the suction of the engine.

These .air valves areentirely automatic in action and once set are not intended to be disturbed or intermittently adjusted, and

7 hence are not provided with any hand-mov ing or control means, since when an engine to which my carburetor is attached is once running, the interior of the carburetor, through which the air must pass .to reach the engine, is heated to the same degree winter or summer.

Another object of my invention is to make the air valves so that they ma 1 be removed and replaced by others of ciiferent capacity, since this permits of a single stock size of carburetorbeing used for different sizes of engine and different fuels, in which case the proportionate amount ofair relative to the fuel may have to be varied.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is de si ned.

These objects I accomplish by means of such. structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of ref.- erence indicate corresponding parts in the several views.

Fig. l is an exterior elevation of the carburetor.

Fig. 2 is a sectional elevation of the same.

Fig. is a bottom plan view, and

Fig. i is a perspective view of a valve member detached.

Referring now more particularly to the characters of reference on the drawings, the numeral 1 denotes a hollow casing provided with preferably opposed and horizontally disposed orifices 2, one of which is adapted to beconnected to a branch from the exhaust gases thus passed into the casing through the other orifice. I I

Formed integral with the casing and spaced froml'he walls thereof all around is a cylindrical wall3 which encloses a central chamber l extending vertically of the casing from top to bottom and open at both ends. The lower end is tapped asat 5 while the opening at the upper end is restricted by a flanged neck 6, formed integral with the casing, and which carries a butterfly valve 7 of ordinary construction, the neck being adapted for connection to the intake manifold ot'an engine.

Screwed into the lower end of the wall 3 and projecting upwardly into the chamber l is a fuel-bowl member 8, which above its lower and threaded end is spaced equally all around from the wall 3. This bowl member has a fuel intake pipe 9 at its lower end, the flow from which is controlled by an automatic ioat-valve structure 10 of standard character. An air passage member 11 leads to the bowl above the float from the atmosphere below the casing to prevent a tendency to vacuum in the bowl.

A plurality of small pipes 12 having inierchangeable nozzle-tips 13 extend upwardopposite sides of and beyond the tapped portion 5 of the wall 3 are rectangular air pas-' sages l5 1n which are removably seated frame members 16, which do not interfere with the passageways and in which flap members 17 are pivotally mounted on rods 18 extending lengthwise of the frames or bearings 16 and also at one end through the metal of the easing surrounding and outlining the lower ends of the air passages as at'19.

Strips of leather or other sound absorbing material 20 are placed along the edges of the upper surface of the flaps, which are themselves of metal, so as to eliminate any noise when the flaps strike'the back plates of the bearings 16.

provided with a plurality of spaced holes 24 1 arranged lengthwise in the arm, and to any one of which the adjacent end of the spring may be connected so as to alter the normal length of the spring and thus alter its tension at the same time.

It will thus be seen that with the operation of the engine, both flap valves will be opened at the same time, and opposed currents of air, both subjected to heat as soon as they enter the passageways 15, will pass about the bowl and meet, causing swirling currents whichwill intimately mingle with the fuel being drawn from the various jets, forming a perfect mixture.

By reason of the flap-valve frames being removable, frames of different thicknesses,

thereby altering the size of the flaps carried thereby, may be inserted ina single stock size of casing member without necessitating the air passages themselves being made of different. sizes. 7

From the foregoing description it will readily be seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to se-- cure by Letters Patent, is l 1. An air valve structure for-carburetor casings having an air passage opening into th interior thereof, comprising a removable frame member adapted to fit into said pas-- sage, a valve member for closing the passage positioned in the frame, and, a common means for pivotally mounting the valve and for holding its frame in position relative to the casing. e r a 2. An air. valve structure for carburetor casings-having an air passage opening into the interior thereof, comprising a removable frame member adapted to 'fit into said pas sage, a valve memberfor closing the passage positioned in the frame, and a rod turnably passing through the frame and the adjacent chamber casing walls andfon which the corresponding valve is mounted;

In testimony whereof I aflix my signature;

IVILLIAM H. SLAYTONI. 

